128 Cincinnatt Society of Natural History. 
far as 54°. Its distribution is regulated to a very great extent by the 
configuration of the country and by the climate. The number of sta- 
tions in northern New Jersey, and in the vicinity of New York, is per- 
haps to be accounted for by the presence of the glacial drift which 
covers the northern portion of New Jersey, and to the fact that the 
Hudson River Vailey forms a highway along which it may have emi- 
grated from the north at the time of the glacial epoch; and finding 
suitable stations in the elevated parts of the country, established itself 
to a certain extent. That this may have been the case is further 
countenanced by the fact that it is there associated with many more 
plants of a northern habitat.* 
No. 2. Clematis alpina, Mill., the only European species of Clematis 
found in the United States, is recorded as having been found by Parry 
in Colorado, between 39°-41° north latitude, but noone has, I believe, 
since seen it. In Kurope itis widely distributed, being found under vari- 
ous forms in the mountains of Austria, Carniola, Piedmont, Dauphine, 
Hungary, Switzerland, Eastern Pyrenees, etc., at from 2,400 to 6,000 
feet elevation.{ Varieties of it, differing only very slightly, are found 
in Siberia, toward the Ochotshei Sea and Kamtschatka. The variety 
Ochotensis, is the one common in the Rocky mountains, and we can 
easily imagine its extension along the highway of the mountain range, 
from Alaska to Colorado. The localities given are Clear Creek Canon, 
Chiami Canon, Denver, Middle Park, Gilpin county, and Gray’s Peak 
in Colorado, Cottonwood Canon, in Wahsatch mountains of Utah, and 
the Teton mountains at 11,000 feet in Northern Idaho. Doubtless 
it is to be found in British America at the north, and may even extend 
up to Alaska. 
No. 3. Clematis Baldwinii, Torr. & Gr., is a very local, strictly 
southern species, having been recorded, as far as I know, from but 
three localities, all in Florida. One is at Tampa, on the west coast, 
another at Mellonville, Lake Monroe, near St. John’s River, on the 
east coast, and the third at St. Augustine. It is a peculiar form, very 
distinct from any of the other species of the United States, and 
possibly related to some of the species of South America, reaching 
Florida, as many other plants have by way of the West India Islands. 
No, 4. Clematis Douglasii, Hook., is a mountainous western species, 
strictly confined, as far as known, to the Rocky mountain ranges, and 
— 
* See Preface to Cat. of N. J. Plants, by N. L. Britton, p. 10. 
+ Gray, Pro. Phila. Acad. Nat. Sci., 1863, p. 56. 
t Loudon Arbor. et Frutic., vol. i., p. 247. 
